Powder-containing oil-in-water emulsified composition

ABSTRACT

There is provided an oil-in-water emulsified composition comprising hydrophobic powder particles, a polyether-modified silicone represented by formula (1), and an ionic water-soluble polymer compound, whereby the succulent feel originating from thickening effect rendered by the ionic water-soluble polymer compound and the effects intrinsic to the hydrophobic powder particles can be demonstrated stably over time in an oil-in-water emulsified composition obtained using an ionic water-soluble polymer compound, to which composition the powder particles are added.

TECHNICAL FIELD

The present invention relates to an oil-in-water emulsified compositionsuitable for use as a cosmetic or other composition for external use.

BACKGROUND ART

Carboxyvinyl polymers or alkyl modified carboxyvinyl polymers and otherionic water-soluble polymer compounds produce increased viscosity byrepulsion between ions, so it is possible to obtain high viscosity usingeven a small quantity thereof. It is therefore possible by using anionic water-soluble polymer compound as a thickening agent to set a widerange of viscosities while minimizing the stickiness or slipperinessthat is specific to a polymer, and also to impart a succulent and freshfeel to the consumer by using the thixotropy specific to the ionicwater-soluble polymer compounds.

Ionic water-soluble polymer compounds are therefore widely used as acosmetic starting material; particularly, as a water-phase thickeningagent for water-based cosmetics, oil-in-water emulsified cosmetics, andthe like.

Whereas an ionic water-soluble polymer compound has excellentcharacteristics as a thickening agent, cases are also identified inwhich it is difficult to appropriately control the viscosity of an addedcomposition because of interaction due to contact with ionic groups ofother ingredients or other ionic substances.

For example, because the surfaces of particles of titanium oxide powdergenerally used as a pigment are usually modified with alumina, zincoxide, or the like, when the powder is added to a water phase that hasbeen thickened with an ionic water-soluble polymer compound, ionsderived from the modifying agent interact with the ionic water-solublepolymer compound, whereby general or localized reductions or increasesin viscosity occur, the powder particles aggregate, and other effectsare encountered, and it is difficult to provide a succulent feel fromthe natural thickening effect produced by the ionic water-solublepolymer compound and to obtain the effects produced by the titaniumoxide powder while maintaining the stability of the composition.

In order to overcome these drawbacks, attempts have been made to controlthe interaction between ions by performing fluorine treatment or anotherhydrophobization treatment on titanium oxide or other powder particles(for example, see Japanese Laid-open Patent Application No. 9-143023,7-112915, or 9-143031), but even when hydrophobized powder particles aredispersed in an oil phase in the process of manufacturing anoil-in-water emulsified composition, elution of ions into the waterphase over time cannot be completely minimized, so it has been difficultto obtain a composition having adequately good stability.

Polysaccharides or derivatives thereof, for example, are also used aswater-soluble polymer compounds that are not affected by ionsoriginating from the added substance, but the added quantity thereofmust be increased in order for a certain degree of viscosity to beretained by these water-soluble polymer compounds. Therefore, when onlya small quantity of the polysaccharide or the like is used, thecomposition being added to is limited to an extremely low viscosity, andwhen a large quantity of the polysaccharide or the like is admixedtherein in order to obtain a high viscosity, slipperiness, stickiness,and also runniness of the polymer and other effects occur, and it isdifficult to provide an additive-containing composition having goodtactile properties.

An object of the present invention is to provide a means fordemonstrating a succulent feel originating from the increased viscosityinduced by the ionic water-soluble polymer compound, and the effectsintrinsic to the powder particles with stability over time, in anoil-in-water emulsified composition that uses an ionic water-solublepolymer compound, to which composition the powder particles are added.

DISCLOSURE OF THE INVENTION

The inventors carried out repeated investigations in order to overcomethe foregoing drawbacks. As a result, they developed the presentinvention upon discovering that by forming an oil-in-water emulsionusing a specific polyether-modified silicone as well as usinghydrophobic powder particles as powder particles to be added, it ispossible to secure the hydrophobic powder particles, including theeluted component thereof, in the oil phase for a long time, and toprovide the desired oil-in-water emulsified composition.

Specifically, the present invention provides an oil-in-water emulsifiedcomposition (hereinafter referred to as “the emulsified composition”)containing:

(a) hydrophobic powder particles;

(b) a polyether-modified silicone represented by the formula (I) below;and

(c) an ionic water-soluble polymer compound.

in which A¹, A², and n number of A³'s are the same or different, and area methyl group, a phenyl group, or a polyoxyalkylene group representedby the general formula:—C₃H₆O(C₂H₄O)_(a)(C₃H₆O)_(b)R′,wherein R′ is a hydrogen atom, an acyl group, or an alkyl group with acarbon number of 1 to 4; and a and b are the same or different integersfrom 5 to 50; and at least one among A¹, A², and n number of A³'s permolecule of the polyether-modified silicone(I) is the aforementionedpolyoxyalkylene group;

R is a methyl group or a phenyl group;

m is an integer from 200 to 600; and

n is an integer from 1 to 40.

The emulsified composition preferably also contains (d) silicone oil.

BEST-MODE FOR CARRYING OUT THE INVENTION

Embodiments of the present invention will be described hereinafter.

(a) Hydrophobic Powder Particles

The hydrophobic powder particles containing the emulsified compositionare powder particles having little interaction with water and littlecompatibility with water, and are usually lipophilic powder particles.The hydrophobic powder particles may be powder particles of a naturallyhydrophobic material, and examples thereof include zinc stearate,aluminum stearate, calcium stearate, zinc myristate, or another metallicsoap powder. The hydrophobic powder particles may also be powderparticles obtained by using hydrophilic or hydrophobic powder particlesas a base material and rendering this material hydrophobic.

Examples of such base materials include titanium oxide, iron oxide,magnesium oxide, zinc oxide, calcium oxide, calcium phosphate, calciumcarbonate, alumina, aluminum hydroxide, barium sulfate, iridescentpigments (titanated mica, bismuth oxychloride, and the like), talc, andthe like. Composite powder particles of powder particles that use thesematerials, or composite powder particles of these powder particles withnylon particles, polyethylene powder, polymethyl methacrylate (PMMA),silica, silicone resin, crystal cellulose, and other powders may be usedin the present invention. These composite powder particles may be addedin an unmodified state to the emulsified composition when the particlesare inherently hydrophobic, or they may be hydrophobized as is the casewith single-material hydrophilic powder particles and added to theemulsified composition when the particles are inherently hydrophilic.

Examples of the hydrophobization treatment performed on the powderparticles as a base material include silicone treatment (treatment withmethylhydrogen polysiloxane, dimethyl polysiloxane, methylphenylpolysiloxane, and other silicone oils; methyl trimethoxysilane, ethyltrimethoxysilane, hexyl trimethoxysilane, octyl trimethoxysilane, andother alkyl silanes; trifluoromethyl ethyl trimethoxy silane,heptadecafluorodecyl trimethoxysilane, and other fluoroalkyl silanes;and the like), fatty acid treatment (treatment with palmitic acid,isostearic acid, stearic acid, lauric acid, myristic acid, behenic acid,oleic acid, rosin acid, 12-hydroxystearic acid, and the like), fattyacid soap treatment (treatment with aluminum stearate, calcium stearate,12-hydroxystearic acid, and the like), fatty acid ester treatment(treatment with a dextrin fatty acid ester, a cholesterol fatty acidester, a sucrose fatty acid ester, a starch fatty acid ester, or thelike), and the like. These hydrophobization treatments may be performedaccording to the usual method. Silicone treatment is suitable amongthese hydrophobization treatments for its ability to impart highstability to the powder particles, and for other effects thereof.

The shape or size of the hydrophobic powder particles is notparticularly limited, and a spherical, tabular, petaled, or other shapemay be employed. A suitable embodiment is one in which sphericalparticles are selected to allow the powder to be used as an externalcomposition that utilizes reflected light to create a wrinkle hidingeffect or chapping relief. In this case, it is possible by including theanti-wrinkle agent or anti-chapping agent described hereinafter in theemulsified composition to obtain a composition capable of producing animmediate wrinkle hiding effect or chapping relief, and long-termreduction of wrinkling and chapping. Furthermore, when sphericalparticles are selected, uneven coverage of the emulsified compositioncan generally be further minimized. The size of the hydrophobic powderparticles may be freely selected so that the mean particle diameter isabout 2 nm to 30 μm for equivalent spherical particles. The particlediameter appropriate for enhancing the immediate whitening effect andwrinkle hiding effect varies according to the types of powders combined,but a diameter of about 5 nm to 10 μm is generally preferred.

The quantity of hydrophobic powder particles contained in the emulsifiedcomposition can be appropriately selected according to the specific formor application of the emulsified composition, the type of the powderparticles, and other factors and is not particularly limited, but 0.01to 20.0% by mass with respect to the composition is usually suitable,and 0.1 to 10.0% by mass is particularly suitable. The effects ofincluding the powder particles in the emulsified composition tend to notbe adequately demonstrated if the quantity is less than 0.01% by masswith respect to the composition, and if the quantity exceeds 20.0% bymass, a rough feel, runniness, stickiness, and other effects tend tooccur in the emulsified composition due to excess admixture of thepowder particles, and problems tend to occur in usability.

(b) Polyether-Modified Silicone (I)

The polyether-modified silicone (I) used in the emulsified compositionis as described above, and more specifically:

at least one among A¹, A², and n number of A³'s per molecule of thepolyether-modified silicone (I) is the polyoxyalkylene group representedby the formula:—C₃H₆O (C₂H₄O)_(a)(C₃H₆O)_(b)R′

and the acyl groups expressed by R′ include formyl, acetyl, propionyl,butyryl, acryloyl, benzoyl, toluoyl, and the like.

Furthermore, the alkyl groups with a carbon number of 1 to 4 expressedby R′ include methyl, ethyl, i-propyl, n-propyl, t-butyl, and n-butylgroups, for example.

If the number of bonds a or b is less than 5, the stability over time ofthe emulsified composition obtained by adding the polyether-modifiedsilicone is inadequate, and if the number of bonds is over 50,stickiness tends to easily occur in the emulsified composition.

The quantity of the polyoxyalkylene group contained in thepolyether-modified silicone (I) is preferably 20 to 70% by mass (notincluding 20% by mass) with respect to the polyether-modified silicone(I). The stability over time of the emulsified composition that isobtained by including the polyether-modified silicone (I) is inadequateif the quantity of the polyoxyalkylene group contained therein is 20% bymass or less, and the compatibility in an oil phase of the emulsifiedcomposition tends to decrease if the quantity is more than 70% by mass.

The number of bonds m in the polyether-modified silicone (I) is alsopreferably an integer from 200 to 600, and n is preferably an integerfrom 1 to 40. If m is less than 200, or if n is zero, the stability overtime of the emulsified composition obtained by adding thepolyether-modified silicone (I) is inadequate, and if m is over 600, orif n is over 40, stickiness tends to occur in the emulsifiedcomposition.

The molecular weight of the polyether-modified silicone (I) is notparticularly limited, and the viscosity thereof is also not particularlylimited, but a suitable molecular weight is in the range of 45000 to100000, particularly in the range of 50000 to 80000; and a suitableviscosity is in the range of 1000 to 100000 cst (at 25° C. or below)when the polyether-modified silicone (I) is in a solution of 50% by massof octamethyl tetrasiloxane. This type of polyether-modified silicone isknown as a gelling agent and is described, for example, in JapaneseLaid-open Patent Application No. 5-311076.

The quantity of the polyether-modified silicone (I) contained in theemulsified composition is preferably 0.01 to 5.0% by mass with respectto the composition, and 0.05 to 3.0% by mass of the same is particularlysuitable. It becomes difficult to impart adequate stability over time tothe emulsified composition if the quantity of the polyether-modifiedsilicone (I) contained therein is less than 0.01% by mass with respectto the composition, and if this quantity exceeds 5.0% by mass of thesame, polymer-specific stickiness can occur in the emulsifiedcomposition and the emulsion performance can sometimes decrease.

(c) Ionic Water-Soluble Polymer Compound

The ionic water-soluble polymer compound is a water-solublealkali-thickened polymer or water-soluble acid-thickened polymer thatforms a gel by being neutralized by an alkaline agent or an acid agent.A water-soluble alkali-thickened polymer is suitable as the ionicwater-soluble polymer compound used in the present invention. Specificexamples include carboxyvinyl polymers, alkyl-modified carboxyvinylpolymers, acrylic acid/alkyl acrylate copolymers and the like, and saltsof these polymers. One or more types of ionic water-soluble polymercompound can be included in the emulsified composition.

The alkaline agent or acid agent used to thicken the water-solublealkali-thickened polymer or water-soluble acid-thickened polymer is notparticularly limited. Sodium hydroxide, potassium hydroxide, ammoniumhydroxide, triethanol amine, L-arginine, and other inorganic or organicbases can be cited as examples of the alkaline agent; and variousorganic acids or inorganic acids can be used as the acid agent.

The quantity of the ionic water-soluble polymer compound contained inthe emulsified composition is preferably 0.01 to 2.0% by mass withrespect to the composition, and particularly preferably 0.01 to 1.0% bymass thereof. It is difficult to obtain the desired thickening effectsif the quantity of the ionic water-soluble polymer compound is less than0.01% by mass with respect to the composition, and if the quantitythereof is more than 2.0% by mass, slipperiness or stickiness tends tobe observed in the emulsified composition and the tactile evaluationthereof tends to decline. There is also a tendency for runniness tooccur due to excess polymer during application.

(d) Silicone Oil

The dispersion properties and solubility of the polyether-modifiedsilicone (I) can be enhanced, and stickiness can be further reduced, byincluding silicone oil in the emulsified composition.

The silicone oil is not particularly limited insofar as it is a siliconeoil that can usually be used in cosmetics or other externally usedcompositions. Examples include methyl polysiloxane, methyl phenylpolysiloxane, octamethyl cyclotetrasiloxane, decamethylcyclopentasiloxane, methyl polycyclosiloxane, methylhydrogenpolysiloxane, dimethyl siloxane/methyl (POE) siloxane copolymer,dimethyl siloxane/methyl (POE) siloxane methyl (POP) siloxane copolymer,methyl polysiloxane emulsion, highly polymerized methyl polysiloxane,dimethyl siloxane/methyl (POP) siloxane copolymer, tetra decamethylhexasiloxane, octamethyl trisiloxane, dodecamethyl cyclohexasiloxane,dimethyl siloxane/methylcetyloxysiloxane copolymer, and the like.

When silicone oil is included in the emulsified composition, thequantity of silicone oil included therein is preferably 0.1 to 50.0% bymass with respect to the composition, and particularly preferably 0.1 to30% by mass thereof. It is difficult to identify the enhancement ofsolubility of the POE-modified silicone and pleasantness during useobtained by including silicone oil if the quantity of silicone oilcontained therein is less than 0.1% by mass with respect to thecomposition, and if this quantity is more than 50.0% by mass, theemulsified composition takes on an oily feel, tends to lose itssucculent feel, and sometimes fails to emulsify properly.

The method of manufacturing the emulsified composition is notparticularly limited insofar as it is a method whereby an oil-in-wateremulsified composition can ultimately be manufactured. The desiredoil-in-water emulsified composition can usually be manufactured byadding hydrophobic powder particles, the polyether-modified silicone(I), and an oil phase preferably containing silicone oil to a waterphase containing the ionic water-soluble polymer compound understirring. It is also possible to manufacture the emulsified compositionin a single step by emulsifying a mixture containing all of the addedcomponents. Another oil phase not containing hydrophobic powderparticles (in the form of emulsified particles) may also be present inthe emulsified composition.

It is possible for the water phase in the emulsified composition to bethickened by the ionic water-soluble polymer compound, and for themigration of eluted components and other ionic elements of thehydrophobic powder particles in the oil phase to the water phase to beminimized by the polyether-modified silicone (I). The effects of ionicelements on the thickened state of the ionic water-soluble polymercompound in the water phase can thereby be minimized, and the emulsifiedcomposition can be endowed with stability over time. Specifically, theeffects originating from the hydrophobic powder and the succulent feeldue to the thickening effect by the ionic water-soluble polymer compoundcan be provided in the emulsified composition while maintaining itsstability over time.

As described above, the emulsified composition on a microscopic level isan oil-in-water emulsified composition in which hydrophobic powderparticles and the polyether-modified silicone (I) are substantiallycontained in an oil phase that is an internal phase (when silicone oilis contained therein, the silicone oil is also included in the oilphase). The phrase “substantially contained in an oil phase” used hereinmeans that the abovementioned components are contained in the oil phasewith the degree of rigorousness at which the particles are approximatedas remaining in the oil phase in the emulsified composition as a whole,and means not excluding cases in which the abovementioned components areidentified as being present in the water phase in an externally usedcomposition with such a degree that one skilled in the art considersrange of error.

As described above, the emulsified composition is suitable for use as anexternally used composition (composition for use on skin (includingscalp and head hair)) that can be classified as a cosmetic, a drug, or aquasi drug. The form thereof is an oil-in-water emulsion, and when thecomposition is a cosmetic, milky lotions, creams, gels, mists, solidcosmetics, and the like can be cited as examples thereof. In the case ofa drug or a quasi drug, ointments, creams, and the like can be cited asexamples thereof.

When the emulsified composition is an externally used composition, othercomponents that can be contained in an externally used composition maybe included therein with such a degree that they do not criticallyhinder the effects of the present invention.

Examples include hydrophilic and hydrophobic powders other than theabove exemplified powders, for which ion elution can be ignored,surfactants, humectants, medications, UV absorbers, preservatives,fragrances, and other agents. Whiteners, anti-chapping agents, and/oranti-wrinkle agents in particular are extremely well suited forinclusion therein as medications. Specifically, in a case in which thehydrophobic powder particles contained in the oil phase of theemulsified composition are a white powder (hydrophobized titanium oxideor the like, for example), the composition is extremely well suited as awhitening cosmetic when the ability to provide an immediate sense ofwhitening is considered. When the hydrophobic powder particles containedin the oil phase of the emulsified composition are spherical powderparticles, long-term wrinkling or chapping relief can be obtained whileat the same time providing an immediate wrinkle hiding effect orchapping relief.

Vitamin C, vitamin C derivatives (vitamin C phosphoric acid ester(salts), vitamin C 2-glucoside, and the like), arbutin, kojic acid,ellagic acid, Rucinol, resorcinol, and derivatives thereof can be citedas examples of whiteners.

β-Glycyrrhetic acid, glycyrrhizinic acid derivatives (VII), allantoin,azulene, hydrocortisone (VIII), and other anti-inflammatory agents; andtranexamic acid and other protease inhibiting agents can be cited asexamples of anti-chapping agents.

Retinol, retinol palmitate, retinol acetate, and other retinoids; andglycolic acid, lactic acid, and other α-hydroxy acids can be cited asexamples of anti-wrinkle agents.

The content of these components in the emulsified composition whenwhiteners, anti-chapping agents, and/or anti-wrinkle agents are used canbe selected within the range in which the desired effects can bedemonstrated according to the drug form, product type, specific type ofmedications used, and other attributes of the emulsified composition,and is not particularly limited.

Lotions, milky lotions, beauty lotions (essences), creams, massagecosmetics, sunscreen cosmetics, makeup base, foundations, lipsticks,rouge, eyeshadows, and the like can be cited as examples of producttypes when the emulsified composition is an externally used composition.

EXAMPLES

The present invention will be described in further detail hereinafterusing examples, but the range of the present invention is not limited bythese examples. Blend quantities in the present examples are expressedas percentages by mass unless otherwise indicated.

[Evaluation Methods]

Evaluation as to whether the test samples described hereinafterdemonstrated the effects of the present invention was performed by themethods below.

(1) Stability over Time

The presence of (i) viscosity change and (ii) powder aggregation wasverified immediately after preparation of a test sample and afterlong-term still standing storage (one month) at 50° C.

(i) Viscosity change was verified by measurement at 25° C. immediatelyafter preparation of the sample and after the abovementioned stillstanding storage using a type-B viscometer (manufactured by ShibauraSystems Co., Ltd.). Evaluation was performed according to the criteriabelow based on the results.

A: Good (viscosity change is less than 50%)

B: Somewhat poor (viscosity change is less than 50 to 100%)

C: Poor (viscosity change is 100% or more)

(ii) The presence of powder aggregation was verified visually.

A: Absolutely no powder aggregation observed

B: Powder aggregation observed, although slight

C: Powder aggregation clearly observed

(iii) A general evaluation of stability over time was performed based onthe results of (i) and (ii).

A: Excellent stability over time ((i) and (ii) both A)

B: Somewhat poor stability over time ((i) and (ii) are both B, or eitherone of (i) or (ii) is A and the other is B)

C: Poor stability over time (when one of (i) and (ii) is C, stabilityover time is judged to be poor regardless of the evaluation given to theother)

(2) Practical Test

A sample (immediately after preparation and after one month) was appliedto the faces of 40 female panelists immediately after the abovementionedstability over time was tested, and practical testing was performed foreach of the following items: (i) succulent feel, (ii) absence ofslipperiness, (iii) absence of stickiness, and (iv) absence ofrunniness.

For (i) succulent feel, evaluation was performed by calculating theratio (%) of panelists who reported experiencing a succulent feel; (ii)absence of slipperiness was evaluated by calculating the ratio (%) ofpanelists who did not identify a slippery feel; (iii) absence ofstickiness was evaluated by calculating the ratio (%) of panelists whodid not report stickiness; and (iv) absence of runniness was evaluatedby calculating the ratio (%) of panelists who did not report runniness.

(3) Evaluation of Skin Color Correcting Effects

When the practical test described in (2) above was performed, aspecialist judge determined whether skin color had been improved foreach panelist, and evaluation was performed by calculating the ratio (%)of panelists for whom it was determined that skin color had beenimproved.

(4) Evaluation of Ability to Accept and Hold Additional Makeup

Immediately after tests (2) and (3) were completed, a commerciallyavailable powdery foundation was further applied on places where thesample had been applied, and the ability immediately after applying thepowdery foundation to (i) accept additional makeup and to (ii) holdadditional makeup three hours after application were visually determinedusing a video microscope (manufactured by Keyence Corporation), andevaluation was performed for the ability to (i) accept additional makeupby calculating the ratio (%) of panelists for whom makeup acceptance wasdetermined to be good, and evaluation of the ability to (ii) holdadditional makeup was performed by calculating the ratio (%) ofpanelists for whom makeup hold was determined to be good.

[Sample Preparation]

Samples (essence: Working Examples 1 through 5; Comparative Examples 1through 7) were prepared according to the formulae shown in Table 1(working examples) and Table 2 (comparative examples). Preparation wasperformed by adding a uniform dispersion of a mixture of components 9through 18 to a solution in which ingredients 1 through 8 and 19 through23 were mixed and dissolved, and dispersing the product using a stirringmachine. The hydrophobic powder particles were a powder obtained byperforming the alkyl-modified silicone treatment (tetradecene was addedafter bringing powder particles into contact with 1,3,5,7-tetramethylcyclotetrasiloxane) by the usual method, and the term “unprocessed”refers to powder (hydrophilic) that has not been hydrophobized.

The polyether-modified silicone 1 is a low-molecular weight (MW about6000) dimethyl polysiloxane/methyl (polyoxyethylene) siloxane copolymerin which R, A¹, and A² in the polyether-modified silicone (I) describedabove arc methyl groups, A³ is a methyl group or the polyoxyalkylenegroup R′ (the polyether content thereof is approximately 20% by mass);and in the polyoxyalkylene group R′, m is 50 to 60, n is 3, a is 0, andb is 9.

The polyether-modified silicone 2 is a high-molecular-weight (MW about55000) poly(oxyethylene/oxypropylene)methyl polysiloxane copolymer inwhich R, A¹, and A² in the polyether-modified silicone (I) are methylgroups, A³ is a methyl group or the polyoxyalkylene group R′ (thepolyether content thereof is approximately 45% by mass); and in thepolyoxyalkylene group R′, m is 400, n is 10, a is 24, and b is 24.

The blend quantities in the tables are in % by mass with respect to theentire quantity of the sample, and the symbol “-” indicates that thecomponent was not admixed into the sample (0% by mass).

TABLE 1 Blend Quantity (% by mass) Working Example No. Ingredient 1 2 34 5 1. Acrylic acid/alkyl 0.1 — — 0.05 — acrylate copolymer 2.Carboxyvinyl 0.1 0.2 0.01 0.15 0.05 polymer 3. Xanthan gum — — — — — 4.Hydroxyethyl — — — 0.1 — cellulose 5. Agar — — — — — 6. Butylene glycol5.0 5.0 5.0 5.0 5.0 7. Glycerin 15.0 3.0 10.0 — 3.0 8. Ethanol 5.0 10.0— 4.0 10.0 9. Unprocessed tita- — — — — — nium oxide powder 10.Unprocessed iron — — — — — oxide powder 11. Unprocessed tita- — — — — —nated mica pigment 12. Hydrophobized — 1.0 0.5 2.0 8.0 titanium oxidepowder 13. Hydrophobized iron — — — 0.2 2.0 oxide powder 14.Hydrophobized 1.5 — 0.5 — — titanated mica pigment 15. Methyl poly- 5.010.0 2.0 5.0 30.0 siloxane 16. Octamethyl 5.0 — 8.0 5.0 —cyclotetrasiloxane 17. Polyether-modified — — — — — silicone 1 18.Polyether-modified 2.0 0.5 3.0 1.0 0.05 silicone 2 19. POE hydrogenated— 1.0 0.5 — — castor oil 20. Potassium hydrox- 8.0 8.0 2.0 8.0 8.0 ide(1% aqueous solution) 21. Antioxidant Suitable Suitable SuitableSuitable Suitable amount amount amount amount amount 22. PreservativeSuitable Suitable Suitable Suitable Suitable amount amount amount amountamount 23. Purified water Balance Balance Balance Balance Balance

TABLE 2 Blend Quantity (% by mass) Comparative Example No. Ingredient 12 3 4 5 6 7 1. Acrylic acid/alkyl 0.1 — — — — 0.05 — acrylate copolymer2. Carboxyvinyl polymer 0.1 0.2 0.05 — — 0.15 — 3. Xanthan gum — — — 1.5— — — 4. Hydroxyethyl cellulose — — — — 2.0 0.1 — 5. Agar — — — — — —3.0 6. Butylene glycol 5.0 5.0 5.0 5.0 5.0 5.0 5.0 7. Glycerin 15.0 3.010.0 3.0 15.0 — 0.5 8. Ethanol 5.0 10.0 — 10.0 7.0 4.0 3.0 9.Unprocessed titanium — 1.0 — — — — — oxide powder 10. Unprocessed ironoxide — 0.2 — — — — — powder 11. Unprocessed titanated — 0.5 — — — — —mica pigment 12. Hydrophobized titanium — — 0.5 1.0 1.0 2.0 1.0 oxidepowder 13. Hydrophobized iron — — — — — 0.2 — oxide powder 14.Hydrophobized titanated — — 0.5 — — — — mica pigment 15. Methylpolysiloxane 5.0 10.0 2.0 10.0 10.0 5.0 10.0 16. Octamethyl 5.0 — 8.08.0 20.0 5.0 1.0 cyclotetrasiloxane 17. Polyether-modified — — — — — 1.0— silicone 1 18. Polyether-modified 2.0 0.5 — 1.0 1.0 — 1.0 silicone 219. POE hydrogenated castor — 1.0 0.5 1.0 — — — oil 20. Potassiumhydroxide 8.0 8.0 2.0 — — 8.0 8.0 (1% aqueous solution) 21. AntioxidantSuitable Suitable Suitable Suitable Suitable Suitable Suitable amountamount amount amount amount amount amount 22. Preservative SuitableSuitable Suitable Suitable Suitable Suitable Suitable amount amountamount amount amount amount amount 23. Purified water Balance BalanceBalance Balance Balance Balance Balance

[Test Results]

The results obtained for the samples (essence: Working Examples 1through 5 and Comparative Examples 1 through 7) obtained using theingredients above are shown in Table 3.

TABLE 3 Working Example No. Comparative Example No. 1 2 3 4 5 1 2 3 4 56 7 (1) Stability over time A A A A A A C C B B C B (2) Practical test(i) Succulent feel 70 67.5 92.5 67.5 75 70 70 90 22.5 20 67.5 47.5 (ii)Absence of slipperiness 77.5 80 87.5 57.5 90 75 77.5 87.5 7.5 12.5 72.560 (iii) Absence of stickiness 65 77.5 75 70 72.5 62.5 75 80 22.5 12.577.5 60 (iv) Absence of runniness 100 100 100 97.5 95 100 100 97.5 37.510 100 20 (3) Skin color correcting effects 52.5 67.5 55 67.5 75 0 37.555 62.5 60 65 57.5 (4) Makeup acceptance and hold (i) Makeup acceptance60 57.5 65 65 67.5 35 37.5 62.5 40 22.5 65 62.5 (ii) Makeup hold 72.5 6067.5 75 62.5 15 27.5 65 37.5 20 65 47.5

According to the results obtained above, particularly when the blendquantities of the essential ingredients were in the preferable range,the results of the practical test of succulent feel and other effectswere good with maintaining the stability over time, and the results ofevaluating the skin color correcting effects, which are mainly dependenton the powder particles, were also good. The makeup acceptance andmakeup hold were also good in cases in which the product was used as amakeup foundation. In contrast, Comparative Example 1 in which thepowder particles were not admixed, had obviously poor skin colorcorrecting effects, which are dependent on the powder particles, and themakeup acceptance or makeup hold was also poor when the product was usedas a makeup foundation. Although some skin color correcting effect wasobtained in Comparative Example 2 in which the powder particles werehydrophilic, stability thereof over time was inferior. The stabilityover time was inferior in Comparative Example 3, in which thepolyether-modified silicone was not admixed. Comparative Examples 4 and5, in which xanthan gum, hydroxyethyl cellulose, and other thickeningagents were admixed instead of the ionic water-soluble polymer compound,had poor evaluations in the practical test. Problems in stability overtime were also identified in Comparative Example 6, in which thepolyether-modified silicone 1 was used, the number of bonds m of thepolyether-modified silicone (I) being smaller than the preferable range.Comparative Example 7, in which agar was used without admixing an ionicpolymer therein, had somewhat poor stability over time, runniness wasidentified therein, and the makeup acceptance thereof was inferior.

Examples of formulations of the emulsified composition will be describedas working examples hereinafter. The emulsified compositions in theseworking examples remained stable over time and had good evaluations inthe practical tests and good evaluations of effects that are dependenton the action of the hydrophobic powder. The hydrophobized powder in theworking examples below is a powder obtained by performing alkyl-modifiedsilicone treatment according to the usual method.

[Working Example 6] Milky Lotion

Blend Quantity Ingredients (% by mass) 1. Acrylic acid/alkyl acrylatecopolymer 0.08 2. Carboxyvinyl polymer 0.5 3. Xanthan gum 0.3 4.Squalane 1.0 5. Decamethyl pentasiloxane 10.0 6. Methyl polysiloxane 1.57. Polyether-modified silicone 2 1.0 8. Hydrophobized titanium oxidepowder 0.8 (particle diameter: 200 to 400 nm) 9. Octyl methoxy cinnamate1.0 10. Glycerin 5.0 11. 1,3-butylene glycol 8.0 12. Ascorbic acid2-glucoside 5.0 13. Aqueous solution (1%) of sodium hydroxide 10.0 14.Ethanol 2.0 15. Antioxidant Suitable Amount 16. Preservative SuitableAmount 17. Purified water Balance

<Manufacturing Method>

An emulsion was obtained by a process whereby a mixture in whichcomponents 4 through 9 had been uniformly dispersed was added to amixture in which components 1 through 3 and 10 through 17 had been mixedand dissolved, and the product was stirred to obtain a uniformdispersion.

[Working Example 7] Cream

Blend Quantity Ingredients (% by mass) 1. Carboxyvinyl polymer 0.8 2.Stearyl alcohol 1.0 3. Solid paraffin 1.0 4. Petrolatum 1.0 5.Methylphenyl polysiloxane 3.0 6. Polyether-modified silicone 2 3.0 7.Hydrophobized titanium oxide powder 5.0 (particle diameter: 200 to 400nm) 8. Jojoba oil 2.0 9. Pentaerythrityl tetraoctanoate 5.0 10. POE (25)cetyl alcohol ether 1.0 11. Glycerin monostearate 0.8 12. Glycerin 3.013. 1,3-Butylene glycol 3.0 14. Retinol acetate 0.2 15. Dextrin 1.2 16.Aqueous solution (1%) of sodium hydroxide 2.0 17. Ethanol 10.0 18.Edetate trisodium 0.1 19. Preservative Suitable Amount 20. Purifiedwater Balance

<Manufacturing Method>

A cream was obtained by a process whereby a heated mixture of components2 through 4, 8 through 11, and 14 and 15, and a mixture of components 5through 7 were added to a mixture of components 1, 12, 13, and 16through 20, and the product was stirred, mixed, and cooled.

[Working Example 8] Gel

Blend Quantity Ingredients (% by mass) 1. Acrylic acid/alkyl acrylatecopolymer 0.1 2. Carboxyvinyl polymer 0.1 3. Octamethylcyclotetrasiloxane 8.0 4. Dimethicone/vinyldimethicone cross-polymer 2.05. Polyether-modified silicone 2 2.0 6. Hydrophobized titanium oxidepowder 0.3 (particle diameter: 200 to 400 nm) 7. Glycerin 2.0 8.1,3-Butylene glycol 5.0 9. Arbutin 5.0 10. Aqueous solution (1%) ofsodium hydroxide 3.0 11. Buffering agent Suitable Amount 12.Preservative Suitable Amount 13. Purified water Balance

<Manufacturing Method>

A mixture in which components 3 through 6 had been uniformly dispersedwas added to a mixture in which components 1, 2, and 7 through 13 hadbeen mixed and dissolved, the product was stirred and uniformlydispersed, and a gel was obtained.

[Working Example 9] Sunscreen Cosmetic

Blend Quantity Ingredients (% by mass) 1. Carboxyvinyl polymer 0.2 2.Xanthan gum 0.1 3. Octamethyl cyclotetrasiloxane 20.0 4. Dimethylsilicone 7.0 5. Phenylmethyl silicone 2.0 6. Polyether-modified silicone2 2.0 7. Hydrophobized titanium oxide powder 5.0 (particle diameter: 10to 50 nm) 8. Hydrophobized zinc oxide powder 5.0 9. Octyl methoxycinnamate 5.0 10. Butyl methoxybenzoyl methane 2.0 11. Polyoxyethylene(60) hydrogenated castor oil 1.0 12. 1,3-Butylene glycol 6.0 13.Dipotassium glycyrrhizate 1.0 14. Silicic anhydride 2.0 15. Aqueoussolution (1%) of sodium hydroxide 1.0 16. Ethanol 10.0 17. PreservativeSuitable Amount 18. Purified water Balance

<Manufacturing Method>

A mixture in which components 3 through 10 had been uniformly dispersedwas added to a mixture in which components 1, 2, and 11 through 18 hadbeen mixed and dissolved, the product was stirred and uniformlydispersed, and a sunscreen cosmetic was obtained.

[Working Example 10] Makeup Base

Blend Quantity Ingredients (% by mass) 1. Carboxyvinyl polymer 0.2 2.Hydroxypropyl cellulose 0.1 3. Octamethyl cyclotetrasiloxane 6.0 4.Dimethyl silicone 6.0 5. Trictanoin 3.0 6. Mineral oil 2.0 7.Polyether-modified silicone 2 2.0 8. Hydrophobized titanium oxide powder1.5 (particle diameter: 10 to 50 nm) 9. Hydrophobized iron oxide powder0.1 10. 1,3-Butylene glycol 6.0 11. Aqueous solution (1%) of sodiumhydroxide 20.0 12. Ethanol 6.0 13. Preservative Suitable Amount 14.Purified water Balance

<Manufacturing Method>

A mixture in which components 3 through 9 had been uniformly dispersedwas added to a mixture in which components 1, 2, and 10 through 14 hadbeen mixed and dissolved, the product was stirred and uniformlydispersed, and a makeup base was obtained.

[Working Example 11] Liquid Foundation

Blend Quantity Ingredients (% by mass) 1. Carboxyvinyl polymer 0.1 2.Stearyl alcohol 1.0 3. Cetyl octanoate 5.0 4. Stearic acid 0.8 5. Methylpolysiloxane 5.0 6. Octamethyl cyclotetrasiloxane 2.0 7.Polyether-modified silicone 2 4.0 8. Hydrophobized titanium oxide powder4.0 (particle diameter: 200 to 400 nm) 9. Hydrophobized iron oxidepowder 0.5 10. 1,3-Butylene glycol 6.0 11. POE alkyl ether 1.0 12.Aqueous solution (1%) of sodium hydroxide 3.0 13. Ethanol 6.0 14.Preservative Suitable Amount 15. Purified water Balance

<Manufacturing Method>

A mixture in which components 2 through 9 had been uniformly dispersedwas added to a mixture in which components 1 and 10 through 15 had beenmixed and dissolved, the product was stirred and uniformly dispersed,and a liquid foundation was obtained. [Working Example 12] Two-LayerLotion

Blend Quantity Ingredients (% by mass) 1. Carboxyvinyl polymer 0.01 2.Sodium polyacrylate 0.01 3. Dimethyl silicone 0.8 4. Polyether-modifiedsilicone 2 0.03 5. Hydrophobized titanium oxide powder 0.3 (particlediameter: 200 to 400 nm) 6. Polymethyl methacrylate powder 2.0 (PMMApowder) 7. PEG/PPG copolymer 0.5 8. Dipropylene glycol 7.0 9. Tranexamicacid 3.0 10. Ethanol 8.0 11. Preservative Suitable Amount 12. Purifiedwater Balance

<Manufacturing Method>

A mixture in which components 3 through 6 had been uniformly dispersedwas added to a mixture in which components 1, 2, and 7 through 12 hadbeen mixed and dissolved, the product was stirred and uniformlydispersed, and a two-layer lotion was obtained.

[Working Example 13] Beauty Lotion

Blend Quantity Ingredients (% by mass) 1. Carboxyvinyl polymer 0.3 2.Acrylic acid/alkyl acrylate copolymer 0.1 3. Succinoglucan 0.3 4.Hydroxypropyl methylcellulose 0.1 5. Pentaerythrityl tetraoctanoate 3.06. Dioctyl succinate 3.0 7. Octamethyl cyclotetrasiloxane 2.0 8.Decamethyl cyclopentasiloxane 2.0 9. Dodecamethyl cyclohexasiloxane 1.010. Methyl polysiloxane 1.0 11. Polyether-modified silicone 2 1.5 12.Hydrophobized titanium oxide powder 1.0 (particle diameter: 200 to 400nm) 13. Hydrophobized titanated mica powder 0.5 14. 1,3-Butylene glycol10.0 15. Glycerin 1.0 16. PEG/PPG copolymer 1.0 17. Ascorbic acid2-glucoside 3.0 18. Aqueous solution (1%) of sodium hydroxide 6.0 19.Ethanol 5.0 20. Antioxidant Suitable Amount 21. Preservative SuitableAmount 22. Purified water Balance

<Manufacturing Method>

A mixture of components 5 and 6 and a mixture in which components 7through 13 had been uniformly dispersed/mixed were added to a mixture inwhich components 1 through 4 and 14 through 22 had been mixed anddissolved, the product was stirred and uniformly dispersed, and a beautylotion was obtained.

[Working Example 14] Milky Lotion

Blend Quantity Ingredients (% by mass) 1. Carboxyvinyl polymer 0.2 2.Acrylic acid/alkyl acrylate copolymer 0.05 3. Hydroxypropyl cellulose0.1 4. Cellulose gum 0.1 5. Octamethyl cyclotetrasiloxane 2.0 6.Decamethyl cyclopentasiloxane 2.0 7. Dodecamethyl cyclohexasiloxane 1.08. Methyl polysiloxane 1.0 9. Polyether-modified silicone 2 1.5 10.Hydrophobized titanium oxide powder 1.0 (particle diameter: 200 to 400nm) 11. Hydrophobized titanated mica powder 0.5 12. 1,3-Butylene glycol10.0 13. Glycerin 1.0 14. PEG/PPG copolymer 1.0 15. PEG/PPG dimethylether 1.0 16. PEG/PPG cetyl ether 0.5 17. Arbutin 4.0 18. Aqueoussolution (1%) of sodium hydroxide 0.7 19. Ethanol 5.0 20. StabilizerSuitable Amount 21. Antioxidant Suitable Amount 22. PreservativeSuitable Amount 23. Purified water Balance

<Manufacturing Method>

A mixture in which components 5 through 11 had been uniformlydispersed/mixed was added to a mixture in which components 1 through 4and 12 through 23 had been mixed and dissolved, the product was stirredand uniformly dispersed, and a milky lotion was obtained.

INDUSTRIAL APPLICABILITY

By the present invention, an oil-in-water emulsified compositioncontaining hydrophobic powder particles is provided, whereby a succulentfeel originating from thickening effect caused by an ionic water-solublepolymer compound and effects originating from the hydrophobic powderparticles can be demonstrated stably over time.

1. An oil-in-water emulsified composition comprising: (a) hydrophobicpowder particles; (b) a polyether-modified silicone represented by thefollowing formula (I):

 in which A¹, A², and n number of A³'s are the same or different, andare a methyl group, a phenyl group, or a polyoxyalkylene grouprepresented by the general formula:—C₃H₆O(C₂H₄O)_(a)(C₃H₆O)_(b)R′,  wherein R′ is a hydrogen atom, an acylgroup, or an alkyl group with a carbon number of 1 to 4; and a and b arethe same or different integers from 5 to 50; and at least one among nnumber of A³'s per molecule of the polyether-modified silicone (I) isthe polyoxyalkylene group; R is a methyl group or a phenyl group; m isan integer from 200 to 600; and n is an integer from 1 to 40; and (c) anionic water-soluble polymer compound which is selected from the groupconsisting of a carboxyvinyl polymer, an alkyl-modified carboxyvinylpolymer, and an acrylic acid/alkyl acrylate copolymer.
 2. Theoil-in-water emulsified composition according to claim 1, wherein thehydrophobic powder particles and the polyether-modified silicone (I) aresubstantially contained in the oil phase.
 3. The oil-in-water emulsifiedcomposition according to claim 1, wherein the hydrophobic powderparticles are one or more types of hydrophobized powder particles ofmaterials selected from the group consisting of titanium oxide, ironoxide, magnesium oxide, zinc oxide, calcium oxide, calcium phosphate,calcium carbonate, alumina, aluminum hydroxide, barium sulfate, aniridescent pigment, talc, and composite powders obtained using thesematerials.
 4. The oil-in-water emulsified composition according to claim1, comprising 0.01 to 20.0% by mass of hydrophobic powder particles,0.01 to 5.0% by mass of polyether-modified silicone (I), and 0.01 to2.0% by mass of the ionic water-soluble polymer compound with respect tothe composition.
 5. The oil-in-water emulsified composition according toclaim 1, containing a skin whitening agent, an anti-chapping agent,and/or an anti-wrinkle agent.
 6. The oil-in-water emulsified compositionaccording to claim 1, wherein the oil-in-water emulsified composition isan externally used composition.
 7. The oil-in-water emulsifiedcomposition according to claim 1, further comprising (d) silicone oil.8. The oil-in-water emulsified composition according to claim 7, whereinthe hydrophobic powder particles, the polyether-modified silicone (I),and the silicone oil are substantially contained in the oil phase. 9.The oil-in-water emulsified composition according to claim 7, comprising0.01 to 20.0% by mass of hydrophobic powder particles, 0.01 to 5.0% bymass of polyether-modified silicone (I), 0.01 to 2.0% by mass of theionic water-soluble polymer compound, and 0.1 to 50.0% by mass ofsilicone oil with respect to the composition.